Dr. Dre is the subject of “The Defiant Ones,” an upcoming four-part HBO documentary that tells the story of his partnership with Jimmy Iovine. In a new clip from the doc, Dre and Snoop Dogg tell the story of how they first linked up in the early ’90s.

DRE: The first time I heard Snoop, a friend of mine had a bachelor party. I’d met Snoop before that—he was selling drugs—and my stepbrother Warren G pops this tape in. I’m like “That’s Snoop? I’m like, ‘man, this is a fucking diamond in the rough and we need to polish it up!‘”

SNOOP: “So it went from that to me receiving a phone call. I hung up. Like, ‘nigga, this ain’t no motherfucking Dr. Dre.’ Nigga called back, like ‘Nigga, be at the studio Monday.'”

DRE: “Snoop comes in the studio, I put this track up for him, and he just freestyled it and the shit was super sick. And then the thought of my solo album started becoming a reality.”